* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 100px;
}

body {
  font-family: "PingFang SC", "Lantinghei SC", "Microsoft YaHei", "HanHei SC", "Helvetica Neue", "Open Sans", Arial, "Hiragino Sans GB", "微软雅黑", STHeiti, "WenQuanYi Micro Hei", SimSun, sans-serif;
}

.protocol {
  width: 100%;
  .protocol__header {
    width: 100%;
    height: 0.8rem;
    text-align: center;
    position: relative;
    font-size: 0.34rem;
    background-color: #fff;
    .arrow {
      position: absolute;
      border-right: 2px solid rgba(0, 0, 0, 1);;
      border-top: 2px solid rgba(0, 0, 0, 1);;
      height: 0.18rem;
      width: 0.18rem;
      left: 0.3rem;
      top: 50%;
      transform: translate(0, -50%) rotate(-135deg);
      -webkit-transform: translate(0, -50%) rotate(-135deg);
      border-left: 1px solid transparent;
      border-bottom: 1px solid transparent;
    }
    .header__title {
      height: 0.8rem;
      line-height: 0.8rem;
      color: rgba(0, 0, 0, 1);
    }
  }
  .protocol__content {
    font-size: 0.24rem;
    color: rgba(0, 0, 0, 1);
    padding: 0.3rem 0.48rem;
    box-sizing: border-box;
    background-color: #f7f9fa;
  }
}